4 Mile Rock Barges is a northeast-facing boat dive in Central Puget Sound. Typically, visibility here is about 25 ft (range 15–35 ft), based on 4 pnwdiving reports from 2024 through 2026.
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Recent Visibility Reports
Dive report for 1/18/26
- Visibility
- A hazy 15 feet, 5-10 feet in the shallows
Epic dive on both barges - huge schools of giant rockfish. So fun to interact floating in the middle of them
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Dive report for 6/15/25
- Visibility
- A hazy 20+ feet, 10 feet in the shallows (low tide)
Excellent dive on the barges. We saw 5 giant nudibranches hunting in a field of anemones. Also spotted a wolf eel in the western wreck and a large school of herring in the safety stop.
Scuba Jess and pnwdiving.com
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